From patchwork Wed Sep 3 15:13:09 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "bhupesh.sharma@freescale.com" X-Patchwork-Id: 4835211 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id BA994C0338 for ; Wed, 3 Sep 2014 15:30:03 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9D4E2201F7 for ; Wed, 3 Sep 2014 15:30:01 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D91292021B for ; Wed, 3 Sep 2014 15:29:59 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XPCPk-0006m6-Da; Wed, 03 Sep 2014 15:24:04 +0000 Received: from mail-bn1lp0140.outbound.protection.outlook.com ([207.46.163.140] helo=na01-bn1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XPCPe-0006gP-PH for linux-arm-kernel@lists.infradead.org; Wed, 03 Sep 2014 15:23:59 +0000 Received: from BN3PR0301CA0077.namprd03.prod.outlook.com (25.160.152.173) by BN1PR03MB217.namprd03.prod.outlook.com (10.255.200.140) with Microsoft SMTP Server (TLS) id 15.0.1019.16; Wed, 3 Sep 2014 15:23:36 +0000 Received: from BL2FFO11FD006.protection.gbl (2a01:111:f400:7c09::168) by BN3PR0301CA0077.outlook.office365.com (2a01:111:e400:401e::45) with Microsoft SMTP Server (TLS) id 15.0.1019.16 via Frontend Transport; Wed, 3 Sep 2014 15:23:36 +0000 Received: from tx30smr01.am.freescale.net (192.88.168.50) by BL2FFO11FD006.mail.protection.outlook.com (10.173.161.2) with Microsoft SMTP Server (TLS) id 15.0.1010.11 via Frontend Transport; Wed, 3 Sep 2014 15:23:36 +0000 Received: from b45370.ap.freescale.net (B45370-01.ap.freescale.net [10.232.40.170] (may be forged)) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id s83FMmbQ005724; Wed, 3 Sep 2014 08:23:32 -0700 From: Bhupesh Sharma To: Subject: [PATCH V3 1/6] Documentation: DT: Add bindings for FSL NS16550A UART Date: Wed, 3 Sep 2014 20:43:09 +0530 Message-ID: <1409757194-28155-2-git-send-email-bhupesh.sharma@freescale.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1409757194-28155-1-git-send-email-bhupesh.sharma@freescale.com> References: <1409757194-28155-1-git-send-email-bhupesh.sharma@freescale.com> X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.168.50; CTRY:US; IPV:CAL; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(6009001)(199003)(189002)(88136002)(6806004)(76176999)(92566001)(81542001)(83322001)(229853001)(50466002)(50986999)(92726001)(33646002)(85306004)(48376002)(36756003)(21056001)(97736001)(76482001)(89996001)(26826002)(20776003)(99396002)(64706001)(44976005)(19580395003)(81342001)(77156001)(19580405001)(110136001)(104016003)(83072002)(85852003)(68736004)(80022001)(90102001)(31966008)(87286001)(74662001)(79102001)(74502001)(105606002)(4396001)(106466001)(50226001)(95666004)(107046002)(62966002)(93916002)(47776003)(77982001)(104166001)(87936001)(102836001)(46102001)(86362001)(84676001)(2351001)(42866002); DIR:OUT; SFP:; SCL:1; SRVR:BN1PR03MB217; H:tx30smr01.am.freescale.net; FPR:; MLV:ovrnspm; PTR:InfoDomainNonexistent; A:1; MX:1; LANG:en; MIME-Version: 1.0 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;UriScan:; X-Forefront-PRVS: 032334F434 Received-SPF: Fail (protection.outlook.com: domain of freescale.com does not designate 192.88.168.50 as permitted sender) receiver=protection.outlook.com; client-ip=192.88.168.50; helo=tx30smr01.am.freescale.net; Authentication-Results: spf=fail (sender IP is 192.88.168.50) smtp.mailfrom=bhupesh.sharma@freescale.com; X-OriginatorOrg: freescale.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140903_082358_975318_78F78659 X-CRM114-Status: UNSURE ( 7.93 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.7 (/) Cc: mark.rutland@arm.com, rob.herring@linaro.org, arnd@arndb.de, marc.zyngier@arm.com, Will.Deacon@arm.com, stuart.yoder@freescale.com, grant.likely@secretlab.ca, Bhupesh Sharma , arnab.basu@freescale.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-3.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch addss the device-tree documentation for Freescale's NS16550 UART (also called DUART). There is a specific errata fix required in FSL NS16550 UART which ensures that an random interrupt storm is not observed when a break is provided as an input to the UART. Signed-off-by: Bhupesh Sharma --- .../devicetree/bindings/serial/of-serial.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/of-serial.txt b/Documentation/devicetree/bindings/serial/of-serial.txt index 7705477..1bdc569 100644 --- a/Documentation/devicetree/bindings/serial/of-serial.txt +++ b/Documentation/devicetree/bindings/serial/of-serial.txt @@ -14,6 +14,7 @@ Required properties: - "altr,16550-FIFO32" - "altr,16550-FIFO64" - "altr,16550-FIFO128" + - "fsl,ns16550" - "serial" if the port type is unknown. - reg : offset and length of the register set for the device. - interrupts : should contain uart interrupt. @@ -39,6 +40,17 @@ Optional properties: property. - has-hw-flow-control: the hardware has flow control capability. +Note: +* fsl,ns16550: + ------------ + Freescale DUART is very similar to the PC16552D (and to a + pair of NS16550A), albeit with some nonstandard behavior such as + erratum A-004737 (relating to incorrect BRK handling). + + Represents a single port that is compatible with the DUART found + on many Freescale chips (examples include mpc8349, mpc8548, + mpc8641d, p4080 and ls2085a). + Example: uart@80230000 {